Tremor measuring magnitude 4.4 was reported from the seas off Hambantota on Monday (24) morning.
The Geological Survey and Mines Bureau said the tremor took place some 25.8 km in the South Eastern seas off Hambantota at approximately 12:45 AM.
The Department of Meteorology said there was no immediate threat to Sri Lanka.
The Disaster Management Centre also noted that there was no immediate threat to Sri Lanka.